Rearview mirror



FIG. 1 is a perspective view showing my new design;

FIG. 2 is a front plan view showing my new design;

FIG. 3 is a side plan view thereof;

FIG. 4 is a rear plan view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The ornamental design for a rearview mirror, as shown and described. 